s3c2416解决无法下载大于60M文件系统(二)USB下载

川长思鸟来 2022-09-18 13:55 213阅读 0赞

前面写了一篇从TF卡下载解决无法下载大于60M文件系统的，这两天把USB下载也改了下。

主要修改文件如下:

common/cmd\_usbd.c

cpu/s3c24xx/usbd-hs.h

cpu/s3c24xx/usbd-ctl-hs.c

首先增加文件大小变量

在usbd-hs.h里增加:extern unsigned int gzsd\_read\_size;

在cmd\_usbd.c里do\_usbd\_dnw 函数里增加

gzsd\_read\_size = 0;

这两个函数基本就不用改了，主要修改usbd-ctl-hs.c

首先在文件前面增加这些声明:

\#define BUF\_SIZE (2112\*1024\*16)  
static int rsetflags = 0;  
static long rnandaddr = 0x700000;  
static long memaddr=0xc0000000;  
static long tmpsize = 0;  
static long read\_tmp\_size = 0;  
static int times = 0;

\_\_u32 gzsd\_read\_size;

BUF\_SIZE为读多少后开始写，首先文件系统是yaffs格式按照2112字节对齐，同时USB读取是每次读取16个字节所以这里后面\*16方便对齐。

下面的修改主要涉及到以下几个 函数，具体的执行过程我这里就不分析了

download\_start，download\_continue，read\_epbuf

我把代码贴出来:

void gzsd_read_epbuf(__u16 *buf, int num)
    {
    	int i;
    	__u16 read_data;
    
    	for(i=0;i<num;i+=2) {
    		read_data = (__u16)UD_EP3_BUF_REG;
    		*buf = read_data;
    		buf++;
    		gzsd_read_size += 2;
    		read_tmp_size += 2;
    		if(read_tmp_size == BUF_SIZE) {
    			download_ptr = (__u16 *)0xc0000000;
    			buf = download_ptr;
    			rsetflags = i;
    			read_tmp_size = 0;
    			char cmd_buf[200];
    			sprintf(cmd_buf, "nand write.yaffs 0x%x 0x%x 0x%x", memaddr, rnandaddr, BUF_SIZE);
    			run_command(cmd_buf, 0);
    			rnandaddr += BUF_SIZE;
    			times++;
    		}
    	}
    	if(rsetflags != 0) {
    		download_ptr += ((num - (rsetflags + 2))>>1);
    		rsetflags = 0;
    	}
    	else
    		download_ptr += (num>>1);
    }
    
    void download_start(__u32 ep_status)
    {
    	__u16 fifo_data[5];
    	__u32 fifo_count;
    	__u32 fifo_byte_cnt;
    	__u32 upload_addr;
    	__u16 temp;
    	__u32 dn_filesize;
    
    	fifo_count = UD_BYTE_READ_CNT_REG;
    	LOG("fifocnt: %x\n", fifo_count);
    
    	if (fifo_count == 5) {
    		read_epbuf(fifo_data, 10);
    		temp = fifo_data[4];
    		LOG("temp: 0x%x\n", temp);
    
    		if (temp==0x1) {
    			upload_addr = fifo_data[0] + (fifo_data[1]<<16);
    			upload_size = fifo_data[2] + (fifo_data[3]<<16);
    			upload_ptr = (__u16 *)upload_addr;
    
    			printf("UploadAddress : 0x%x, UploadSize: 0x%x\n",
    				upload_ptr, upload_size);
    
    			if (op_mode == USB_CPU_MODE) {
    				LOG("CPU_MODE Bulk In Function\n");
    				upload_start();
    			} else {
    				LOG("DMA_MODE Bulk In Function\n");
    				UD_FIFO_CON_REG		= UD_DMA_ENABLE;
    				UD_INDEX_REG		= UD_INDEX_EP1;
    				UD_DMA_IF_CON_REG	= UD_MAX_BURST_INCR16;
    				UD_BYTE_WRITE_CNT_REG	= ep1_maxpktsize;
    				UD_MAX_PKT_REG		= ep1_maxpktsize;
    				UD_DMA_FIFO_CNT_REG	= ep1_maxpktsize;
    				UD_DMA_CNT_REG		= ep1_maxpktsize;
    				UD_DMA_MEM_BASE_ADDR_REG = upload_addr;
    				UD_DMA_TOTAL_CNT1_REG	= upload_size;
    				UD_DMA_TOTAL_CNT2_REG	= upload_size>>16;
    				UD_DMA_CON_REG		= UD_DMA_FLY_ENABLE|UD_DMA_TX_START|USB_DMA_MODE;
    			}
    		}
    		download_filesize=0;
    		return;
    	} else {
    		download_addr = s3c_usbd_dn_addr;
    		read_epbuf(fifo_data, 8);
    		if (ep_status&(0x1<<4))
    			fifo_byte_cnt = fifo_count * 2 -1;
    		else
    			fifo_byte_cnt = fifo_count * 2;
    
    		LOG("downloadFileSize==0, 1'st fifo_byte_cnt : 0x%x\n",
    			fifo_byte_cnt);
    
    		download_filesize = fifo_data[2] + (fifo_data[3]<<16);
    		download_ptr = (__u16 *)download_addr;
    
    		if(download_filesize > BUF_SIZE) {
    			char cmd_buf[200];
    			strcpy(cmd_buf, "nand erase 0x700000 0xF8D0000");
    			run_command(cmd_buf, 0);
    			rsetflags = 0;
    			rnandaddr = 0x700000;
    			memaddr=0xc0000000;
    			tmpsize = 0;
    			read_tmp_size = 0;
    			times = 0;
    		}
    		/*
    		 * The first 8-bytes are deleted.
    		 * USB format : addr(4)+size(4)+data(n)+cs(2)
    		 */
    		gzsd_read_epbuf(download_ptr, fifo_byte_cnt-8);
    
    		if (op_mode == USB_CPU_MODE) {
    			if (ep_status & (0x2<<2)) {
    				fifo_count = UD_BYTE_READ_CNT_REG;
    
    				if (ep_status&(0x1<<4))
    					fifo_byte_cnt = fifo_count * 2 -1;
    				else
    					fifo_byte_cnt = fifo_count * 2;
    
    				LOG("2'd fifo_byte_cnt : %x\n", fifo_byte_cnt);
    				read_epbuf(download_ptr, fifo_byte_cnt);
    			}
    		} else {
    			dn_filesize = download_filesize-fifo_byte_cnt;
    			if (dn_filesize > ep3_maxpktsize) {
    				UD_FIFO_CON_REG		= UD_DMA_ENABLE;
    				UD_INDEX_REG		= UD_INDEX_EP3;
    				UD_DMA_IF_CON_REG	= UD_MAX_BURST_INCR16;
    				UD_MAX_PKT_REG		= ep3_maxpktsize;
    				UD_DMA_FIFO_CNT_REG	= ep3_maxpktsize;
    				UD_DMA_CNT_REG		= ep3_maxpktsize;
    				UD_DMA_MEM_BASE_ADDR_REG= download_addr+fifo_byte_cnt-8;
    				dn_filesize		= (dn_filesize/ep3_maxpktsize)*ep3_maxpktsize;
    				UD_DMA_TOTAL_CNT1_REG	= (__u16)(dn_filesize);
    				UD_DMA_TOTAL_CNT2_REG	= (__u16)(dn_filesize>>16);
    				UD_DMA_CON_REG		= UD_DMA_FLY_ENABLE|UD_DMA_RX_START|UD_USB_DMA_MODE;
    
    				LOG("Out Direction DMA RX Start\n");
    				LOG("download_ptr : 0x%x, UD_DMA_MEM_BASE_ADDR_REG : 0x%x, dn_filesize : 0x%x\n",
    					download_ptr, UD_DMA_MEM_BASE_ADDR_REG, dn_filesize);
    			}
    			else
    				op_mode = USB_CPU_MODE;
    		}
    	}
    }
    
    void download_continue(__u32 ep_status)
    {
    	__u32 fifo_count;
    	__u32 fifo_byte_cnt;
    
    	fifo_count = UD_BYTE_READ_CNT_REG;
    	if (ep_status&(0x1<<4))
    		fifo_byte_cnt = fifo_count * 2 -1;
    	else
    		fifo_byte_cnt = fifo_count * 2;
    	LOG("downloadFileSize!=0, 1'st fifo_byte_cnt : %x\n", fifo_byte_cnt);
    	gzsd_read_epbuf(download_ptr, fifo_byte_cnt);
    
    	if (ep_status & (0x2<<2)) {
    		fifo_count = UD_BYTE_READ_CNT_REG;
    
    		if (ep_status&(0x1<<4))
    			fifo_byte_cnt = fifo_count * 2 -1;
    		else
    			fifo_byte_cnt = fifo_count * 2;
    		LOG("2'd fifo_byte_cnt : %x\n", fifo_byte_cnt);
    		gzsd_read_epbuf(download_ptr, fifo_byte_cnt);
    	}
    
    	/* USB format : addr(4)+size(4)+data(n)+cs(2) */
    	if((download_filesize - 10) < 10*1024*1024) {
    		if (((__u32)download_ptr - download_addr) >= (download_filesize - 8)) {
    			printf("Download Done!! Download Address: 0x%x, Download Filesize:0x%x\n",
    				download_addr, (download_filesize-10));
    			verify_checksum();
    			s3c_receive_done = 1;
    			char cmd_buf[200];
    			unsigned long wsize;
    			unsigned long tmpmem,tmpnand;
    			wsize = download_filesize - 10;
    			tmpmem = 0xc0000000;
    			if(wsize < 1*1024*1024) {
    				tmpnand = 0x0;
    				if(wsize % (2*1024) != 0)
    					wsize = ((wsize/(2*1024)) + 1)*(2*1024);
    				strcpy(cmd_buf, "nand erase 0x0 0x80000");
    				run_command(cmd_buf, 0);
    				sprintf(cmd_buf, "nand write.jffs2 0x%x 0x%x 0x%x", tmpmem, tmpnand, wsize);
    				run_command(cmd_buf, 0);
    			}
    			else {
    				tmpnand = 0x300000;
    				if(wsize % (2*1024) != 0)
    					wsize = ((wsize/(2*1024)) + 1)*(2*1024);
    				strcpy(cmd_buf, "nand erase 0x300000 0x400000");
    				run_command(cmd_buf, 0);
    				sprintf(cmd_buf, "nand write.jffs2 0x%x 0x%x 0x%x", tmpmem, tmpnand, wsize);
    				run_command(cmd_buf, 0);
    			}
    		}
    	}
    	else {
    		if (gzsd_read_size >= (download_filesize - 10)) {
    			int size;
    			char cmd_buf[200];
    			size = gzsd_read_size - (times * BUF_SIZE) - 2;
    			sprintf(cmd_buf, "nand write.yaffs 0x%x 0x%x 0x%x", memaddr, rnandaddr, size);
    			run_command(cmd_buf, 0);
    			s3c_receive_done = 1;
    			printf("Download Done!! Download Filesize:0x%x\n",(gzsd_read_size -2));
    		}
    	}
    }

修改完成后，只需要执行dnw 0xc0000000就可以完成烧写.